Toolholder



Oct. 16, 1945. v. E. GRIFFIN. v2,386,851

TOOL HOLDER' Filed July 12, 1944 Patented Oct. 16, 1945 4rrooLHoLnnRVictor E. Griffin, Cicero, Ill., assigner toAtlas Press Company,Kalamazoo, Mich.

Applicationuly 12, 1944, Serial No. 544,530

2 Claims.

The present invention relates to new and useful improvements in toolholders for lathes, Shapers, and other machine tools and has for itsprimary object to provide, in a manner as hereinafter set forth, adevice of this character which is capable of substantially universaladjustment whereby right hand, left hand or straight turning or cuttingat any angle may be done without the necessity of changing holders orfor removing the holder from the tool post.

Another very important object of the invention is to provide anadjustable tool holder of the aforementioned character comprising aunique construction and arrangement for rmly clamping the tool and forpositively securing same in adjusted position.

Other objects of the invention are to provide a tool holder of thecharacter described which will be comparatively simple in construction,strong, durable, highly eicient and reliable in use, compact and whichmay be manufactured at low cost.

All of the foregoing and still further objects and advantages of theinvention will become apparent from a study of the followingspecication, taken in connection with the accompanying drawing whereinlike characters of reference designate corresponding parts throughoutthe several views, and wherein:

Figure 1 is a view in side elevation of a tool holder constructed inaccordance with the present invention, showing a bit mounted therein;

Figure 2 is a top plan View thereof;

Figure 3 is a view principally in vertical section, taken substantiallyon the line 3-3 of Figure 2;

Figure 4 is a View in transverse section, taken substantially on theline 4-4 of Figure l;

Figure 5 is a side elevational view showing the holder with an insidethreading tool mounted therein.

Referring now to the drawing in detail, it will be seen that referencecharacter I designates a shank to be secured in the usual tool post of alathe or other machine tool. Extending into the shank I from the forwardend thereof is a rearwardly inclined kerf 2. Formed inwardly with theforward end of the shank I and projecting forwardly therefrom is a pairof spaced, vertically aligned upper and lower eyes 3 and 4,respectively. The eye 4 is provided with a serrated lower end 5.

Mounted for rotary adjustment in the eyes 3 and 4 is a post 6 having athreaded upper end portion. The post 6 is provided, on its lower end,

with a head I having a serrated surface 8 which is engageable with thesurface 5 of the eye 4. Extending downwardly into the post 6 from theupper end thereof is a slot 9 the lower end wall or bottom Ill of whichis inclined in the plane of the lower wall of the kerf 2.

Encircling the post 6 between the eyes 3 and 4 is a sleeve il having atdiametrically opposite sides thereof openings I2 which communicate withthe slot 9 immediately adjacent the bottom wall II) thereof. Formingintegrally with the sleeve II in the upper portion thereof and eX-tending between the openings I2 is a substantially wedge-shaped bar I3the lower surface of which parallels the lower end wall I0 of the slot9. A cap nut I4 is threaded on the upper end portion of the post 6 andengaged with the eye l 3 for clamping the assembly on a bit I5 or othertool.

In use, the sleeve II is positioned between the eyes 3 and 4 and thepost 6 is inserted upwardly through said eyes, the slotted portion ofsaid post straddling the bar I3. The cap nut I4 is then threaded on theupper'end portion of the post 6 and the bit I5 is inserted in theopenings I2 and slot 9. The cap nut I4 is then tightened for rmlyclamping the bit I5 between the lower end I of the slot 9 and thecomplemental lower face of the bar I3. By simply loosening the cap nutI4, the members II and 6 with the bit I5 therein may be rotatablyadjusted to any desired position. The kerf 2 accommodates the stock ofthe bit I5 when straight cutting is to be done or when rotatablyadjusted said bit.

The members 5 and II may be removed and replaced with posts and sleeveswhich will accommodate therein other tools, For example, in Figure 5 ofthe drawing there is shown a sleeve I5 which is formed to accommodate aninside threading tool I6. The post I'I is also formed to accommodate thetool I5. In this construction, the tool I6 may be rotatably adjusted inthe members I5 and I'I` It is believed that the many advantages of anladjustable tool holder constructed in accordance with the presentinvention will be readily understood and although preferred embodimentsare as illustrated and described, it is to be understood that furthermodifications and changes in the details of construction may be resortedto which will fall within the scope of the invention as claimed.

What is claimed is:

l A tool holder comprising a shank, a pair of spaced, aligned eyes onone end of said shank,

a post mounted for rotary adjustment in the post and the other eye forsecuring said post in adjusted position.

2. A tool holder of the character described comprising a shank, a pairof spaced, aligned eyes on one end of the shank, said shank having akerf extending thereinto fromsaid one end thereof between the eyes, avertical post mounted for rotary adjustment in the eyes, said posthaving a slot extending downwardly thereinto from the upper end thereoffor the reception of a tool, the lower end wall of the slot beinginclined, a sleeve encircling the post between the eyes, and havingopenings therein accommodating the tool, a bar traversing the upperportion of the sleeve and including a lower surface paralleling thelower end wall 'of the slot in the sleeve, a cap nut threaded on theupper end portion of the post and engaged with one of the eyes forclamping the bar and said post on the tool, and a head on the lower endof the post engaged beneath the other eye, said other eye and said headcomprising coacting serrated surfaces for positively securing the postin adjusted position.

VICTOR E. GRIFFIN.

